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PIV may stand for:

  • Particle image velocimetry, a method to measure velocities in fluid
  • Peak inverse voltage, an electronics term
  • Pentium 4 microprocessor, produced by Intel ("IV" is Roman numeral for "4")
  • Personal Identity Verification, as specified by FIPS 201
  • Picasso-IV, an Amiga video card.
  • Plena Ilustrita Vortaro de Esperanto, a dictionary of Esperanto
  • Posterior interventricular artery, an artery supplying the heart
  • Post indicator valve, a valve for underground fire sprinkler shutoff
  • Protecting group, as Piv, Pivaloyl protecting group
  • The ISO 639 language code for Vaeakau-Taumako, a Polynesian language.
  • P = IV, the formula describing power in terms of current and voltage.
  • Peripheral intravenous catheter or peripheral venous catheter
  • Prime Instant Video, an Amazon Video streaming service